US3227775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfuric alkylation acid recovery
Assignee: Texaco Development Corp
•
Filing: 1965-01-26
•
Granted: 1966-01-04
•
Expires: 1985-01-26
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Goldsby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:42
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/86; C07C2/868; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A PROCESS WHEREIN AN ISOPARAFFIN IS ALKYLATED WITH AN OLEFIN AND AN ALKYL SULFATE IN THE PRESENCE OF A SULFURIC ACID CATALYST IN AN ALKYLATION ZONE WHREIN SAID CATALYST BECOMES CONTAMINATED WITH POLYMERIC ORGANIC MATERIAL, THE IMPROVEMENT WHICH COMPRISES: CONTACTING AN OLEFIN WITH USED ALKYLATION ACID CONTAINING POLYMERIC ORGANIC CONTAMINANTS EFFECTING FORMATION OF AN ABSORPTION PRODUCT COMPRISING ALKYL SULFATES, CONTACTING SAID ABSORPTION PRODUCT WITH A HYDROCARBON SOLVENT AT A TEMPERATURE BELOW ABOUT 40*F. EFFECTING EXTRACTION OF AT LEAST A PORTION OF SAID POLYMERIC ORGANIC CONTAMINANTS, SEPARATING RAFFINATE COMPRISING ALKYL SULFATES AND SULFURIC ACID, AND PASSING SAID FAFFINATE TO SAID ALKYLATION ZONE.
Claim 2
Dependent Claim
102 words
IN A PROCESS WHEREIN AN ISOPARAFFIN IS ALKYLATED WITH AN OLEFIN AND AN ALKYL SULFATE IN THE PRESENCE OF A SULFURIC ACID CATALYST IN AN ALKYLATION ZONE WHREIN SAID CATALYST BECOMES CONTAMINATED WITH POLYMERIC ORGANIC MATERIAL, THE IMPROVEMENT WHICH COMPRISES: CONTACTING AN OLEFIN WITH USED ALKYLATION ACID CONTAINING POLYMERIC ORGANIC CONTAMINANTS EFFECTING FORMATION OF AN ABSORPTION PRODUCT COMPRISING ALKYL SULFATES, CONTACTING SAID ABSORPTION PRODUCT WITH A HYDROCARBON SOLVENT AT A TEMPERATURE BELOW ABOUT 40*F. EFFECTING EXTRACTION OF AT LEAST A PORTION OF SAID POLYMERIC ORGANIC CONTAMINANTS, SEPARATING RAFFINATE COMPRISING ALKYL SULFATES AND SULFURIC ACID, AND PASSING SAID FAFFINATE TO SAID ALKYLATION ZONE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |